Zen Rocks

Zen Rocks is a limited, single-harvest, Mythical crop from the Zen Event, and that "single-harvest" flag is the single most important fact for its economics. Multi-harvest crops keep paying out from one seed, but Zen Rocks gives you exactly one payout per plant — so every unit you sow has to count, and you never want to harvest it in a plain, unmutated state. With no recorded seed cost, sell price or growth time here, judge it on that one-shot structure plus its Mythical tier, which gives it a respectable but not top-end base value.

Because it is Zen type, it responds to Zen-targeted items and the pets that came out of the same event, most notably the Prismatic Kitsune line. That synergy is your lever: a single-harvest crop lives or dies on the quality of its one mutation roll.

The clear strategy is to never sell Zen Rocks raw. Hold each plant until you can stack strong multiplicative mutations, because with only one harvest there is no second chance to recover a wasted one. It is best grown deliberately and in small batches in the mid-to-late game, when you have the mutation infrastructure to turn each single harvest into its maximum possible Sheckle value.